Neutrino production of opposite sign dimuons in the NOMAD experiment

被引：51

作者：

Astier, P ^{[1
]}

Autiero, D

Baldisseri, A

Baldo-Ceolin, M

Ballocchi, G

Banner, M

Bassompierre, G

Benslama, K

Besson, N

Bird, I

Blumenfeld, B

Bobisut, F

Bouchez, J

Boyd, S

Bueno, A

Bunyatov, S

Camilleri, L

Cardini, A

Cattaneo, PW

Cavasinni, V

Cervera-Villanueva, A

Collazuol, GM

Conforto, G

Conta, C

Contalbrigo, M

Cousins, R

Daniels, D

Degaudenzi, H

De Santo, A

Del Prete, T

Dignan, T

Di Lella, L

Silva, ED

Dumarchez, J

Ellis, M

Fazio, T

Feldman, GJ

Ferrari, R

Ferrère, D

Flaminio, V

Fraternali, M

Gaillard, JM

Gangler, E

Geiser, A

Geppert, D

Gibin, D

Gninenko, S

Godley, A

Gomez-Ccdeenas, JJ

Gosset, J

机构：

[1] Univ Paris 06, LPNHE, Paris, France

[2] Univ Paris 07, LPNHE, Paris, France

[3] LAPP, Annecy, France

[4] Johns Hopkins Univ, Baltimore, MD USA

[5] Harvard Univ, Cambridge, MA 02138 USA

[6] Univ S Carolina, Columbia, SC 29208 USA

[7] Univ Calabria, I-87036 Cosenza, Italy

[8] Ist Nazl Fis Nucl, Cosenza, Italy

[9] Univ Dortmund, Dortmund, Germany

[10] Joint Inst Nucl Res Dubna, Dubna, Russia

[11] Univ Florence, Florence, Italy

[12] Ist Nazl Fis Nucl, I-50125 Florence, Italy

[13] CERN, Geneva, Switzerland

[14] Univ Lausanne, Lausanne, Switzerland

[15] Univ Calif Los Angeles, Los Angeles, CA USA

[16] Univ Melbourne, Melbourne, Vic, Australia

[17] Russian Acad Sci, Inst Nucl Res, Moscow, Russia

[18] Univ Padua, Padua, Italy

[19] Ist Nazl Fis Nucl, Padua, Italy

[20] Univ Pavia, I-27100 Pavia, Italy

[21] Ist Nazl Fis Nucl, I-27100 Pavia, Italy

[22] Univ Pisa, Pisa, Italy

[23] Ist Nazl Fis Nucl, Pisa, Italy

[24] Roma 3 Univ, Rome, Italy

[25] CEA Saclay, DAPNIA, Saclay, France

[26] Univ Sydney, Sydney, NSW 2006, Australia

[27] Univ Urbino, I-61029 Urbino, Italy

[28] Ist Nazl Fis Nucl, I-50125 Florence, Italy

[29] Rudjer Boskovic Inst, Zagreb, Croatia

[30] IFIC, Valencia, Spain

[31] ETH Zurich, Zurich, Switzerland

来源：

PHYSICS LETTERS B | 2000年 / 486卷 / 1-2期

基金：

美国国家科学基金会; 俄罗斯基础研究基金会; 澳大利亚研究理事会;

关键词：

D O I：

10.1016/S0370-2693(00)00612-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The NOMAD Collaboration presents a study of opposite sign dimuon events in the framework of Leading Order QCD. A total of 2714 neutrino- and 115 antineutrino-induced opposite sign dimuon events with E-mu 1, E-mu 2 > 4.5 GeV, 15 < E-nu < 300 GeV and Q(2) > 1 (GeV/c)(2) are observed in the Front-Calorimeter of NOMAD during the 1995 and 1996 runs. The analysis yields a value for the charm quark mass of m(c) = 1.3(-0.3-0.3)(+0.3+0.3) GeV/c(2) and fur the average semileptonic branching ratio of B-c = 0.095(-0.007-0.013)(+0.007+0.014). The ratio of the strange to non-strange sea in the nucleon is measured to be kappa = 0.48(-0.07-0.12)(+0.09+0.17). The measured rate of charm-induced dimuon relative to single muon, as a function of neutrino energy, is consistent with the slow rescaling hypothesis of heavy quark production. (C) 2000 Published by Elsevier Science B.V.

引用

页码：35 / 48

页数：14

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